What was found
DURING A "C" CHECK AT MAINTENANCE FACILITY. THE FOLLOWING DISCREPANCY WAS NOTED. AIRCRAFT EXTERNAL SKIN HAS SCRATCH BETWEEN FRAME 27-28; AT STRINGER 21R-21L. BLENDED 2 EACH AREAS AREA A 5.200"L X 0.900"W, AREA B 0.740"L X 0.250"W, ORIGINAL SKIN THICKNESS CHEM MILL: 0.032" SKIN 0.050". NO DAMAGED ALLOWED IN THIS AREA. NO CUTOUT REQUIRED ON B. CUT OUT DAMAGED AREA A. FABRICATED REPAIR PARTS, DOUBLER AND FILLER. APPLIED CHEMICAL CONVERSION TO REPAIR PARTS AND REWORKED AREAS. PRIMERED. APPLIED SEALANT. INSTALLED REPAIR WET.